Question

Register A holds the 8-bit binary 11011001. To change the value of Register A to 01101101, the following logic microoperation has to be performed on the operand respectively.

• A. To change the value of Register A to 01101101, the following logic microoperation has to be performed on the operand respectively.}
• B. 10110100, XOR
• C. 10110100, OR
• D. 10110100, AND

Hint:

XOR (exclusive OR) is used to flip specific bits where the mask has 1s, and leave others unchanged. It is commonly used in bit manipulation tasks.

Answer 1

The Correct Option is A

The initial value of Register A is 11011001, and we want to change it to 01101101. To achieve this, we perform a bitwise XOR operation with a mask. The mask that will flip the necessary bits is 10110100. \[ \text{11011001} \, \text{XOR} \, \text{10110100} = 01101101 \]
Thus, performing XOR with the mask 10110100 changes the value of Register A to 01101101.
Therefore, the correct answer is 1. 10110100, XOR.